Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Age- and sex-standardized prevalence of periodontitis per 1,000 residents aged 25–64 years in the Ladysmith, Wisconsin, study region, by zip code (shown in white boxes), January 1, 2006–December 31, 2010. Numbers in parentheses, 95% confidence interval.
